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(No Model.) 3 Sheets-Sheet. 1.

A. & E. WIRSGHING.

PRINTING TELEGRAPH.

EMurgnlo m Patented Nov. 4, 1884.

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N. PETERS. PnawLim-v nmmr. Washmgton. n. cy

A. 817 E. WIRSOHING.

PRINTING TELEGRAPH.

3 Sheets-Sheet 3.

(No Model.)

No. 30169 6. Pa-tentedNov. 4,1884.

E nut/wk 0 rm 1 doa duw WRS c309 Unirrnn trams lfarnnr @rrrono ALOYS \VIRSGHING AND EMIL IVIRSCHING, OF BROOKLYN, NEW'YORK.

PRlNTlNG TELEGRAPH.

EPECIEICATICN forming part of Letters Patent No. 307,696, dated November 4,1884.

Application filed April 22, 1884.

T0 ctZZ whom it may concern.-

Be it known that we, ALoYs WIRsonINe and EMIL Wrnscnrnc, both of Brooklyn. in the county of Kings and State of New York, have invented certain new and useful Improvements in Printing-Telegraph Instruments; and we do hereby declare that the following is a full and exactdescription thereof.

This invention relates to that class of instruments in which two type-wheels are employed, lmpressions from either of which may be pro duccd at the will of the operator at the trans mitting-station. An instrument of this cl1aracter has been patented to Aloys \Virsching, October 16, 1883, No. 286,667; and we will describe our present improvements as applied to an instrument constructed according to said patent; but we desire to have it well'understood that our present invention may also be successfully used in connection with other instruments of the same general nature.

One part of our invention relates to the means whereby the impressions are changed from one type-wheel to the other,

being to eifect this automatically and without any loss of time.

The second part of our invention relates to improved means for obtaining a clear impression from one type-wheel, while the paper strip is positively kept out of contact from the characters of the other type-wheel until the change is effected, by which the second wheel becomes effective instead of the first.

The accompanying drawings form a part of this specification, and represent what we consider the best means for carrying out our invention.

Figure 1 is a front elevation showing the principal portions ofa printing-telegraph instrument. Fig. 2 is a front elevation on a larger scale, illustrating our invention. This figure shows the parts in position to receive impressions from the rear type-wheel, J. Fig. 3 is a plan of certain portions of Fig. 2. Figs. 4 and 5 are corresponding plans showing modifications of Fig. 3. Fig. 6 is a diagram showing certain apparatus employed at the trans mitting-station and the electrical connections at the receivii'ig-station.

Similar letters of reference indicate corre sponding parts in all the figures.

In these drawings we have represented the novel parts with so much of the ordinary parts as is necessary to indicate their relation therethe object (No model.)

to. The impressionpad K, mounted at or near the end of the printinglever I. is formed, as in the above-mentioned patent. with two series ofimpressionsurfaces, k alternating with hollow spaces, the iinpressionsurfaces of one series being opposite the hollow spaces of the other series. The pad is capable of revolving on its axis it. being controlled by the two ratchet-wheels L L and their pawls M DP, 0 being a retaining-pawl, which may be employed, if desired, but the use or" which is not absolutely necessary. The pawls M M are pivoted at a and are normally held out of contact from the ratchcts L L by means of springs m of, the stop at serving to limit their motion. The cooperation of the pawls M M with the ratchets L L" and the effects thereof are exactly the same as has been fully described in the above-mentioned patent, with the exception that when one or the other pawl becomes operative the iiriuting-pad moves one step on the upward motion of the printinglever instead of on the downward motion, as heretofore. A detailed description of such operation is therefore considered superfluous in this place.

The downward-projeeting ends of the pawls M M are finished with inclined planes in m, as shown, against which bears a pin, a, projecting laterally from the core N of the electro-magnet N, which core constitutes at the same time an armature, inasmuch as it is pivoted at a, and, assuming north or south p0- larity, according as the spool N is energized by a positive or negative electric current, moves into contact with either the south pole or the north pole of the permanent magnet N Duringt-he vibrations of the core or armature N its pin it acts on one or the other ofthe inclined planes m" or, throwing one or the other I of the pawls M M into position to engage with its respective ratchet L L as soon as the printing-lever I rises to make an impression.

The arrangement of the parts N N N constitutes a very quick-acting polarized electromagnet, and it will be seen that the taking of impressions from one type-wheel. or the other is fully controlled by energizing said electromagnet by means of positive and negative currents. These currents must of course be transmitted by the operator'from the transmitting-instrument, and it is necessary that they be transmitted over a separate wire from that over which the currents'for the type-wheel magnets are transmitted. We will shortly describe an apparatus for effecting this.

Referring to the diagram, Fig. 6, A and B are two line-wires.

O is a transmitter of the ordinary construe tion, except as to additions to be described.

The wire B is connected to the ordinary pole-changing mechanism (not shown) for the service'of the eseapement electro-magnets.

The characters of one type-wheel are represented by a circle of buttons, D, while the characters of the other type-wheel are represented by a concentric row of buttons, E. The depression of any one of these buttons arrests the revolving needle F and effects the printing in the well-known manner. On depress ing anyone of the outer buttons, metallic contact is made between said button and a ring, D. On depressing any one of the inner buttons, contact is made between it and the ring is connected to the magnets H H by means of branching wires 1 2. The other pole of this battery is connected to the needle F by wire 3. The return-wires 4 5 from the magnets H H are connected to the rings D E, respectively. It will now be seen that by depressing a button of the outer circle the armature I of magnet H will be attracted, while by depressing a button in the inner circle the armature I of magnet H will be attracted, contact being established between the needle F and the rings D or E by means of the shank of the button which is being depressed. The armatures I and l have each two contacts, 13 i, so connected to the main battery J, the line-wire A, and to earth, as shown in the diagram, that when one armature, I or I, is attracted a positive current is transmitted to the magnet N of the receiving-instrument, while when the other armature is attracted a negative current will be so transmitted.

It follows from the foregoing that when any button of one series is depressed one of the pawls, M or M", assumes an operativepositiou, and the same is the case with the other pawl on depressing any one of the other series of buttons, so that the taking ofimpressions from one type-wheel or the other is dependent on which series of buttons the operator at the transmitting-station manipulates.

We propose to make a separate application for patent for a transmitting instrument enibodying the principles herein described, and also the mode of operating herein indicated.

The printing-magnet H? of the receiver may be included in the circuit of line-wire B, as described in the abovementioned patent; but in most cases we prefer to include it in the circuit of wire A, as shown in Fig. 6, it being well understood that the sensitive magnet N becomes effective more rapidly than the printing -magnet H, which has to overcome considerable resistance, so that the pawls will always be in position before the printinglever begins to rise.

i} is an auxiliary battery, one pole of which Figs. 2 and 3 show a spring-arm, P, formed with lateral projections 19, which, when the printing-lever rises, depress the paper strips into the hollows formed in the printing pad, thus stretching it over the impressionsurface,

whereby a clear impression is produced from I two projections arranged similar to those shown in Fig. 4.

Te claim as our invention 1. In a printing telegraph instrument, the combination, with two type-wheels controlled by suitable electro magnets, and with a revolving printing-pad, of a polarized electromagnet, the armature or core of which serves to control the position of the prin ting-pad, the type wheelcontrolling electro magnets and the printing-pad-controlling electro-magnets 1 being connected to separate line wires, substanti all y as and f or the purposes herein specified.

2. In a printing -telegraph instrument, the

combination, with two type wheels and a printing-pad carried on a printing-lever, of type wheel controlling electro magnets, a printing electro-magnet, and a printing-padcontrolling electromagnet, the latter two being connected in a single line-wire circuit separate from that for the type-wheel-controlling magnets, and adapted to be operated by positive and negative currents of electricity, substantially as and for the purposes herein specified.

3. The combination of the polarized electro-magnet N, having an armature or core,N, with pawls, as M M", and with a printing-pad having two series of impression-surfaces, and carrying ratchets L L", all constructed to operate with reference to a printing-lever and to two type-wheels, substantially as herein specified.

I. The combination, with a printing-pad having two series of impression surfaces al ternating' with hollow spaces, of one or more spring arms, P, having lateral projections 12, arranged so as to partly depress the paper into the hollow spaces when the printing-pad rises to receive an impression from either typewheel.

In witness whereof we have hereunto set our hands this 21st day of April, 1884.

ALOYS W'IRSOHING. EMIL WIRSGHING.

Witnesses:

A. H. GENTNER, J. E. WIRsoHINe. 

